Sketch Filter - windows phone 8.1 silverlight using C#

Question

I have an image in WriteableBitmap format now I want to apply a sketch filter on it and show it in an image control without saving. how can I achieve this ?

Answer 1

The Lumia Imaging SDK has a SketchFilter you can use.

Here's a quick function which will apply a SketchFilter to wbIn and return the filtered image in wbOut

using Lumia.Imaging;
using Lumia.InteropServices.WindowsRuntime;
using Lumia.Imaging.Artistic;

...

async Task FilterWriteableBitmap(WriteableBitmap wbIn, WriteableBitmap wbOut)
{
    using (var imageSource = new BitmapImageSource(wbIn.AsBitmap()))
    using (var filterEffect = new FilterEffect(imageSource))
    using (var renderer = new WriteableBitmapRenderer(filterEffect,wbOut)) 
    {
        var filter = new SketchFilter(SketchMode.Color);

        filterEffect.Filters = new IFilter[] { filter };

        await renderer.RenderAsync();
    }
}

...

await FilterWriteableBitmap(originalWB,filteredWB)
img.Source = filteredWB;